US187703A

US187703A - Improvement in wrewches

Info

Publication number: US187703A
Authority: US
Publication date: 1877-02-27
Anticipated expiration: 1894-02-27

Description

VAUGUSTUS S. BUNKER, LAWRENCE, ASSIGNOR OF ONE-HALF HIS RIGHT TO WOODBURY SANBORN, OF CHELSEA, MASSACHUSETTS.

IMPROVEMENT IN WRENCHES.

Specification forming part of Letters Patent No. 7,703, dated February 27,1877 application tiled April 10, 1876.

To clL whom it may concern:

Be it known that I, AUGUs'rUs S. BUNKER, of Lawrence, in the county'of Essex and Oommonwealth of Massachusetts. have invented an Improved Wrench.

The object of my invention is to so construct a wrench by applying a spring to one of its sides that it will securely hold a nut when placed in the same, not allowing the same to fall or slip from the wrench.

' My invention is very convenient in removing nuts from theaxles of a Wagon; and I do declare that the following is such a true, perfeet, and exact description thereof that others skilled in the art to which it appertain's can make and use the saine, reference being had to the accompanying drawing, and to the letters of reference marked thereon, for a more complete description thereof.

The drawing represents an ordinary carriage-wrench having my invention applied thereto.

A represents a carriage-wrench, having a iat elliptic spring, B, riveted to one of the working-faces of the wrench. The spring is preferably secured by means of one or more oval rivets, thus eiectually preventing the spring' from twisting or becoming displaced in the wrench.

To apply the wrench to a carriage-nut, the side provided with the spring is placed in contact with the side of the nut, and then, by exerting slight lateral pressure, the ends of the spring are forced backwardly until the wrenchhead slips over the nut. When the nut has been removed from the carriage or other structure, the free ends of the spring B press firmly against the side of the nut, and hold the latter securely between the spring and opposite side of the wrench-head.

'patent of J. Burt, No. 85,276, dated December 29,1868. In the Wrench above referred to one end of the springrests against the lower portion of the working-face of the movable jaw, While the opposite end of the spring is bent backwardly to slide on the nose of the jaw, thereby causing the nut to bear only on the apex of the spring.

In my improved wrench the spring is completelys protected by the head of the wrenchv against breakage or displacement', and, again,

the nut is rmly heldwithin the Wrench by the sharp ends of the spring, which serve to grasp the extreme ends f one edge ofthe nut and force the latter` squarely against the opposite side of the wrench-head, thereby preventing any displacement ofthe nut from the wrench.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

'A carriage-wrench provided with a dat elliptic spring, secured at its middle portion to one of the faces of the wrench-head, substantially'as and"for the purpose specified.

, A. S. BUNKER. iL. si Witnesses: Y

J osEPH L. BONNEY, GHAs. D. MOORE.